#include <iostream>
#include <cmath>
#include <vector>
using namespace std;
signed main() {
char ok[10]{ 'b', 'v', 'g', 'd', 'z', 'l', 'm', 'n', 'r', 'w'};
string s;
getline(cin,s);
vector<string> words,ans;
string cur;
for(int i = 0; i < s.length(); i++){
if(s[i] != ' ') cur += s[i];
else{words.push_back(cur); cur.clear();}
}
for(auto i: words){
bool norm = false;
for(auto j: i)
if(strchr(ok,tolower(j))) norm = true;
if(norm) ans.push_back(i);
for(auto i: ans) cout << i << "\n";
x
2
+
y
=
16
...
.
(
1
)
x + y = 4 (2)
rearrange (2) to y = 4 - x (could do x = 4 - y )
substitute y = 4 - x into (1)
hence:
4
−
⇒
8
and
0
factor and solve : 2x(x - 4 ) = 0
,
substitute these values into y = 4 - x , to find corresponding values of y.
x = 0 : y = 4 - 0 = 4 → (0 , 4)
x = 4 : y = 4 - 4 = 0 → (4 , 0 )
These are the points of intersection with the line x +y = 4 and the circle
Answer link
Объяснение:
#include <iostream>
#include <cmath>
#include <vector>
using namespace std;
signed main() {
char ok[10]{ 'b', 'v', 'g', 'd', 'z', 'l', 'm', 'n', 'r', 'w'};
string s;
getline(cin,s);
vector<string> words,ans;
string cur;
for(int i = 0; i < s.length(); i++){
if(s[i] != ' ') cur += s[i];
else{words.push_back(cur); cur.clear();}
}
for(auto i: words){
bool norm = false;
for(auto j: i)
if(strchr(ok,tolower(j))) norm = true;
if(norm) ans.push_back(i);
}
for(auto i: ans) cout << i << "\n";
}
x
2
+
y
2
=
16
...
...
...
...
...
...
.
.
(
1
)
x + y = 4 (2)
rearrange (2) to y = 4 - x (could do x = 4 - y )
substitute y = 4 - x into (1)
hence:
x
2
+
(
4
−
x
)
2
=
16
⇒
x
2
+
16
−
8
x
+
x
2
=
16
and
2
x
2
−
8
x
+
16
−
16
=
0
⇒
2
x
2
−
8
x
=
0
factor and solve : 2x(x - 4 ) = 0
⇒
x
=
0
,
x
=
4
substitute these values into y = 4 - x , to find corresponding values of y.
x = 0 : y = 4 - 0 = 4 → (0 , 4)
x = 4 : y = 4 - 4 = 0 → (4 , 0 )
These are the points of intersection with the line x +y = 4 and the circle
x
2
+
y
2
=
16
Answer link
Объяснение: